#Copyright (c) 2011, Walter Bender
#Permission is hereby granted, free of charge, to any person obtaining a copy
#of this software and associated documentation files (the "Software"), to deal
#in the Software without restriction, including without limitation the rights
#to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
#copies of the Software, and to permit persons to whom the Software is
#furnished to do so, subject to the following conditions:
#The above copyright notice and this permission notice shall be included in
#all copies or substantial portions of the Software.
#THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
#IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
#FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
#AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
#LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
#OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
#THE SOFTWARE.
# This procedure is invoked when the user-definable block on the "extras"
# palette is selected.
# Usage: Import this code into a Python (user-definable) block; when
# this code is run, the turtle will create a block at the current
# location of the turtle. The first argument to the Python block
# should be a string containing the name of the desired
# block. Arguments to the block can be passed by expanding the Python
# block to include up to two additional arguments. Note that the
# height of the block is pushed to the FILO heap and can be used to
# advance the position of the turtle when creating stacks.
# For example, try the following to place forward 100, right 90 on the canvas:
# start
# Python(forward, 100) <-- Python load_block.py expanded to two arguments
# setxy(xcor, (subtract(ycor, pop))) <-- subtract top of heap from ycor
# Python(right, 90) <-- Python load_block.py expanded to two arguments
def myblock(tw, blkname):
###########################################################################
#
# Load a block on to the canvas
#
###########################################################################
from TurtleArt.tapalette import block_names, block_primitives, \
special_names, content_blocks
from TurtleArt.tautils import find_group
def make_block(tw, name, x, y, defaults):
x_pos = x + 20
y_pos = y + 20
tw._new_block(name, x_pos, y_pos, defaults)
# Find the block we just created and attach it to a stack.
tw.drag_group = None
spr = tw.sprite_list.find_sprite((x_pos, y_pos))
if spr is not None:
blk = tw.block_list.spr_to_block(spr)
if blk is not None:
tw.drag_group = find_group(blk)
tw._snap_to_dock()
# Disassociate new block from mouse.
tw.drag_group = None
return blk.height
def find_block(tw, blkname, x, y, defaults=None):
""" Create a new block. It is a bit more work than just calling
_new_block(). We need to:
(1) translate the label name into the internal block name;
(2) 'dock' the block onto a stack where appropriate; and
(3) disassociate the new block from the mouse. """
print blkname
for name in block_names:
# Translate label name into block/prim name.
if blkname in block_names[name]:
if (name in block_primitives and \
block_primitives[name] == name) or \
name in content_blocks:
return make_block(tw, name, x, y, defaults)
for name in special_names:
# Translate label name into block/prim name.
if blkname in special_names[name]:
return make_block(tw, name, x, y, defaults)
return -1
# Place the block at the active turtle (x, y) and
# push height to stack.
x, y = tw.active_turtle.get_xy()
if type(blkname) == type([]):
name = blkname[0]
value = blkname[1:]
dy = int(find_block(tw, name, x, y, value))
else:
name = blkname
dy = int(find_block(tw, name, x, y))
if dy != -1:
tw.lc.heap.append(dy)